"Please read attached question and give fully detailed all work shown answer all calculations and steps to get answer.
Given the following demand schedule for a specific textbook:
Point Price($) QD(thousand copies)
A 10 60
B 20 50
C 30 40
D 40 20
(a) Please compute the price elasticity of demand between successive points.
(b) Which price maximizes publisher's revenues? Calculate and explain.
Please give throughough step by step all work shown answer and please show all calculations and how you got answer and make it very detailed all work shown please.